Magnetic clutch.



' f 92. www QQ. Powmw" www No. 821,022. PATENTBD MAY 22, 1906.

H. H. CUTLER.

MAGNETIC CLUTCH. APPLIUATION FILED AUG.5,1903,

HENRY H. CUTLER, OF MILWAUKEE, WISCONSIN.

vMAGNETIC CLUTCH.

To all whom ibm/ay concern:

Be it `known that I, HENRY H. CUTLER, a citizen' of the United States, residing at Mil- Wauke'e, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Improvement in Magnetic Clutches, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying draw-I Io ings, forming a part of this specification.

My invention relates to improvements in magnetic clutches.

In all magnetic clutches there exists a tendency for the armature member to remain in l r 5 contact with the magnet member after the energining-coil hasbeen denergized, owing to thegresidual magnetism in the members. As this isvoftentimes objectionable, various schemes have b@ devised for separating the zo armature member from the magnet member on denergizing the winding of the magnet member. In some instances a spring ,has

been employed for this purpose.

Infthe present invention it is proposed to v 5. effect the separation of the armature member from the magnet member on denergizing the clutch-winding by a supplemental Winding employed only for the purpose of exerting a force to separate the clutch members 'I' construct the clutch with a supplemental Winding-Which may be energized to separate the members of the clutch from each other on the denergization of the clutch-winding.

The pre erred embodiment of my inven- I ytion is illustrated in the accompanying drawings, in which* Figure 1 is a sectional-view of my improved i I. clutch, and Fig. 2 is a diagram-of the circuits.

Throughout the accompanyingv drawings like reference characters designate similar and corresponding parts.

The clutch shown in said drawings has a magnet member 1, which in the resent instance has its periphery adapted or use as a pulley, and an armature member 2. The armature member is fixedupon the shaft 3, While the magnet member is free to rotate inl 5,0 dependently'of said shaft and armature member. y

Y The armature member is fastened to a flange upon the hub 4, which is of-non-mag-l lnetic material, such as brass or other equivasis'lent material, by screws 5, the hub being Specification of Letters Patent. Application filed mgm 5,1903. Serin No. 168,389.

.and not to connect the same. Accordingly, in the preferred embodiment of my invention ratentett May 22, 1906.

gizing the magnet to attract the armaturev the magnet member 1 'is Yarmember 2 to ranged Within an annular channel formed in the face of the magnet member opposite the .armature member, a cover 9 being provided.

to protect said winding and hold the same 1' place. In the opposite side'of vthe 'magnets member is another annular @ham-e1; in wharf-.fa 1 flic v 7.` f armature-plate 12 vis situated adjaeentt0 the, Il. i,

is arranged a supplemental winding 10. I

side of the magnet member in which the sup'- plemental Winding is located', and :when the energized it is atl"- Y y 7.5`v i' 4This Winding, like'.l I- g, isvheld ing" lace and pr .j tected by a cover 11, fittedv 1n the.l annular L channel for said Winding. -`,The armature- `8o so that it may revolve With the magnet mem?A l ,supplemental winding 1s tracted to the magnet member,A as wilLbe. hereinafterexplained.

the main windm plate 12 is loosely mounted upon the h'ub`4,

ber independently of the armature member of the clutch, and is connected with va ringfl4 byone or more pins 13. These pins pass through suitable holes in the magnet `member formed therefor, and the ring 14, which is preferably of brass or some other non-magnetic material, bears against the inner face of the armature member 2 and is preferably arranged in a depression in the face of the mag-V net member. The pins hold lthe armature member of the clutch and the armature-plate at such a distance'from each other that when the magnet member is in contact with either the armature-plate or armature member it Will be out of contact with the other.

In Fig. 2 is illustrated diagrammatically the circuits for the clutch. One terminal of each of the windings is connected by conductor 15 WithA the sup lymain 17, the opposite terminals of sald) windings being connected by conductors 18 and 19 with separate oints of a switch. The lever 20 of the sWitc is connected with the other supply-main 21 and when thrown to the right connects the prima Winding 8 in circuit and when thrown to t e left connects the supplemental wind- 10 in circuit.

y the construction of the clutch herein..

shown the armature member may be quickly `11o vIoo 'fia'zf civisme a-Pcwsiusa;

@24g comer separated from the magnet member by connecting the supplemental winding in circuit after deiiergizing the main winding. On energization of tlie supplemental winding the primary or magnet member will be quickly separated from the secondary armature member by the former being attracted toward the armature-plate of the supplemental winding, the secondary member being held in a iixed position by the pins which pass through the primary member.

Under certain conditions it might be desirable to have the supplemental winding energized constantly, or before the main winding is denergized, so that on opening the circuit of the main winding of the clutch the separation of the members will take lace almost instantaneously. To effect this result, the circuits for the windings and the switch may be readily arranged by those skilled in the art.

It is a matter of little moment which is the driven and which is the driving member of the clutch, as this depends u on the circumstance or the manner in whic the clutch is to be applied. I refer to the members of the clutch as the magnet member and armature member merely for convenience in describing my invention, and therefore it will be understood that the windings may be diiferently arranged or carried by other parts if it should be deemed more advantageous to secure the best results, and the part operated by the force exerted by the supplemental winding can be arranged in other ways and differently connected to cause the separation of the clutch members.

These several ways in which the embodiment of my invention herein set forth may be modified are suggested to illustrate how the construction of the clutch which I claim may be widely varied and the same yet remain within the spirit or principle of my invention. There are many other changes in the construction, arrangement, and combination of parts which I have not noted, but which fall within the scope of my invention, and therefore I do not limit myself to any structure of the clutch except as I particularly specify in the claims appended hereto.

The terminals of the main and supplemental windings will be connected in the usual and well-known manner with collecting-rings, the leads or connecting-wires extending between the windings and the collecting-rings being provided in suitable channels or openings extending through the field-magnet and the shaft.

Having described my invention, what I claim as new, and desire to secure by Letters Patent,` is- 1. In a magnetic clutch, the combination with a driving and a driven member, of amain winding for exerting a force to connect said members with each other, and a supplemental winding for exerting a magnetic force to disconnect said members said windings adapted to be energized one at a time.

2. In a magnetic clutch, the combination with a driving and a driven member, of a main winding for exerting a force to connect said driven member withsaid driving member, a supplemental winding, and means operated by the force exerted by said supplemental winding when it is energized to entirely separate said members said windings adapted to be energized one at a time.

3. In a magnetic clutch, the combination with a magnet member, of an armature member arranged upon one side of said magnet member, a main winding for exerting a force to attract said armature member to said magnet member, a part arranged upon the opposite side of said magnet member and movable independently of said armature member, means for normally holding said part out of contact with said magnet member when said armature member is in contact withsaid magnetmember, and a supplemental winding for exerting a force to attract said magnet member to said part, whereby the magnet member may be entirely separated from the armature member when desired.

4.. In a magnetic clutch, the combination with a magnet member, of an armature member arranged upon one side of saidmagnet member, a main winding for exerting a force to connect said armature member with said magnet member, a part arranged upon the opposite side of said magnet member and rotatable independently of said armature member, one or more pins passing through said magnet member and holding said part out of contact with said magnet member when the latter is in engagement with the armature member, and a supplemental winding for exerting a force when energized to bring said part and magnet member toward each other to entirely separate the members of the clutch.

5. In a magnetic clutch, the combination with a driving member, of a driven member, a main winding for exerting a force to attract said driven member to said driving member, a part normally bearing against said driven member and adapted to rotate independently of said driving member, and a supplemental winding for exerting a force when energized to operate said part to entirely separate the driving member from the driven member.

6. In a magnetic clutch, the combination with a driving member, of a driven member movable relatively to said driving member, a main windingfor exerting a force to connect said driven member with said driving member, a supplemental winding, and a part rotatable independently of said drivin member operated by the force exerted y said supplemental winding when energized to entire y separate said driven member from said driving member;

IOO

7. The combination with a magnet member, of an armature member, a main winding carried by said magnet member for exerting a force to connect said armature member therewith, a supplemental winding also carried by said magnet member, and a part rotatable independently of said armature member operated by the force exerted by said supplemental winding when energized to entirely separate said armature member from said magnet member.

8. In a magnetic clutch, the combination with a driving member, of a driven member arranged upon one side thereof, a main winding for exerting a force to attract said driven member to said driving member, an armature arranged upon the opposite side of said driving member and rotatable independently of said armature member, one or more pins passing through said driving member and bearing against the driven member to hold said armature out of contact with said driving member when the driven member is in engagement with said driving member, and a supplemental winding for exerting a force to attract said armature to said driving member to entirely separate the driving member from the driven member.

9. .In a magnetic clutch, the combination with a magnet member, of an armature member arranged on one side thereof, a main winding carried by said magnet-member for exerting a forceto connect said armature member with said magnet member, an armature arranged upon the opposite side of said magnet member and rotatable independently of said first-mentioned armature member, one or more pins passing through said magnet member and bearing against the armature member to hold said armature out of contact with the magnet member when the armature member is in engagement therewith, and a supplemental Windingalso carried by said primary member for exerting a force to attract said armature to said magnet member and thereby entirely disconnect said armature member from said magnet member.

10. In a magnetic clutch, the combination with a magnet member, of an armature member movable relatively thereto, a main Winding for exerting a force to attract said armature member to said magnet member, a plate bearing against said armature member and movabtle freely thereof, an armature arranged upon the opposite side of said magnet memberbone or more pins extending throu h said magnet member and connected Wit said plate to hold said armature out of engagement with said magnet member when the armature member is connected with said magnet member, and a supplemental winding for exerting a force to attract said armature to said magnet member and thereby entirely release the armature member from said magnet mem-ber.

11. In a magnetic clutch, the combination with a magnet member loosely mounted upon a suitable hub of an armature member xed to said hub, a second armature also loosely mounted upon said hub and arranged upon the opposite side of said magnet member to said armature member, one or more pins extending through said magnet member and holding said second armature out of contact With said magnet member when the latter is connected with said first armature member, amain winding carried by said magnet member for exerting a force to attract said first armature member to said magnet member, and a supplemental winding also carried by said magnet member, for exerting a force to attract said magnet member to said second armature and thereby release said magnet member from said armature member.

12. In a magnetic clutch, the combination with a driving member, ofa driven member, a main winding for exertin a force to attract said driven member to said driving member, a supplemental winding for exerting a force to separate said driven member from said driving member, and means for energizing said windings one at a time.

In witness whereof I have hereunto subscribed my name in the presence of two Witnesses.

HENRY H. OUTLER.

Witnesses:

M. R. ROCHFORD, EDWIN vB. H. TOWLE, Jr. 

